Malicious PDF — malware analysis report

Static analysis result for SHA-256 5901e8e073124bcc…

MALICIOUS

PDF

49.4 KB Created: 2020-08-04 03:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 326172aa13cdd3166d465906de224db3 SHA-1: f2e3f9a2e2df89f1d85b6035ddbd203e95e0778d SHA-256: 5901e8e073124bcc785a0aa2acc53a024af714e908cee6d766c51528709b2499
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with a critical heuristic firing on a link to a known malicious redirector (ttraff.com). Another heuristic indicates a mass external PDF link farm, with the first URL pointing to a Shopify domain. The document body, though heavily obfuscated, contains the text 'Assembler des pdf acrobat' and the malicious URL, suggesting a lure to a site that likely hosts further malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=assembler+des+pdf+acrobat
    • http://files.ytchaim.com/uploads/1/3/1/4/131453684/9061795.pdf
    • http://files.cozineclimbers.com/uploads/1/3/1/4/131483279/gibepipusoj_logerubepe.pdf
    • http://files.shopcountrybarn.com/uploads/1/3/1/4/131453733/8688910.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3380/files/navodaya_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/new_year_2016_photo_frames.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/35603271995.pdf
    • https://cdn.shopify.com/s/files/1/0439/8910/6846/files/24066443835.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/sugugemexujasid.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/engineering_mechanics_statics_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/11403881858.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/67795457285.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/73349958013.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/45861968265.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/automotive_service_advisor_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/30369195434.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008010.bin
b1f79b3dbf4d081fb7d56fba7cdff680ade08c2d58bc5ed29d44f53eaaf7541a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8010 5432 bytes
font_01_sfnt_off00009264.bin
0a41eec8fce4034ac2283cd55abcdd33255f3c11bd3ab7391752b3a7025a04c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9264 12176 bytes